The prediction on in-line vortex-induced vibration of slender marine structures

作     者：Wan-Hai Xu Xi-Feng Gao Jie Du 

作者机构：State Key Laboratory of Hydraulic Engineering Simulation and SafetySchool of Civil EngineeringTianjin University 

出 版 物：《Acta Mechanica Sinica》 (力学学报（英文版）)

年 卷 期：2012年第28卷第5期

页      面：1303-1308页

核心收录：

学科分类：081505[工学-港口、海岸及近海工程] 08[工学] 0815[工学-水利工程] 0802[工学-机械工程] 0824[工学-船舶与海洋工程] 0814[工学-土木工程] 0701[理学-数学] 082401[工学-船舶与海洋结构物设计制造] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：supported by the Specialized Research Fund for the Doctoral Program of Higher Education of China (SRFDP)(20100032120047) the Independent Innovation Fund of Tianjin University (2010XJ-0098) State Key Laboratory of Ocean Engineering (Shanghai Jiao Tong University) (1104) the National High Technology Research and Development Program of China(863 Program) ( 2012AA051705) the National Natural Science Foundation of China (51209161) 

主　　题：Vortex-induced vibration Wake oscillatormodel In-line Slender marine structures 

摘      要：The in-line （IL） vortex-induced vibration （VIV） that occurs frequently in ocean engineering may cause severe fatigue damage in slender marine structures. To the best knowledge of the authors, in existing literatures, there is no efficient analytical model for predicting pure IL VIV. In this paper, a wake oscillator model capable of analyzing the IL VIV of slender marine structures has been developed. Two different kinds of van der Pol equations are used to describe the near wake dynamics related to the fluctuating nature of symmetric vortex shedding in the first excitation region and alternate vortex shedding in the second one. Some comparisons are carried out between the present model results and experimental data. It is found that many phenomena observed in experiments could be reproduced by the present wake oscillator model.